Stone-channeling machine



(No Model.)

' W. H. BRYANT.

STONE GHANNBLING MACHINE;

No. 486,847. Patented Nov. 29, 1892.

Invenlor.

FIT/Dest- '''UNITED STATES PATENT OFFICE.

VILLIAM H. BRYANT, OF NORTH AMHERST, OHIO.

STONE-CHANNELING MACHINE.

SPECIFICATION forming part of Letters Patent No. 486,847, dated November29, 1892.

Application filed September 24, 1891. Serial No. 406,632. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM H. BRYANT, a citizen of the United States,residing at North Amherst, in the county of Lorain and State of Ohio,have invented certain new and usefulImprovementsinStone-ChannelingMachines; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to improvements in stone-channeling machines; andtheinvention consists in the construction and combination of parts, ashereinafter fully described, and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a side elevation of theconstruction embodying my invention and illustrating thechanneling-lever in working position at both ends and as it is pivotedat the center. Fig. 2 is a longitudinal sectional elevation, enlarged,of the box which holds the inner sliding end of the lever. Fig. 3 is across-section of the box and lever on line x at, Fig. 2. Fig. 4 is aside elevation of the disk on the power-shaft and the wrist-plate, thelever-supporting box,-and a section of the lever, all enlarged over Fig.1.

Referring to Fig. 1, A represents a set of drills broken off so as toshow only the lower portions thereof, and O the side guides in which thedrills Work.

F is aclamp fixed to the guide and designed to hold the drills inposition in a way that is well known in this art.

E represents the lever, formed in two-sections overlapping one anotherand pivoted at e in the yoke by which they are suspended. The usualcushions or springs e are placed between the sections of the lever E,and the outer extremity of said lever is connected with the set ofdrills A. At its inner or opposite end the lever E passes through a boxG, forming a bearing therefor, and in which said lever is adapted toslide more or less, according as the wrist-pin upon which said box issupported is brought nearer to or farther from the axial center of thepower-shaft upon which the disk H is supported in the usual way. Thisdisk has a flat face, and secured to it is the wrist-plate K, upon whichis the wrist-pin k. The said plate K, carrying the the operation ofthemachine for any reason it is desired that either set of drills shouldbe idle, the wrist-pin 7c is adjusted up so as to come to the axialcenter of the power-shaft which carries the disk H, and, being in thecenter thereof, there will be no movement of the drills on that side ofthe machine. Then if more or less stroke be desired for the said levert-he wrist-plate K is adjusted so as to throw the wrist-pin more or lessoff the center.

The box G is pivotally suspended upon the wrist-pin k, and said box isformed in a single piece having an opening longitudinallyv what largerthan the depth of the lever, so that the lever will not bear againstsaid lips or flanges and so that there will be a slight space betweenthe lever and said lips or flanges, and hence no wear thereon. Intothese recesses I place suitable bearing-pieces 'g', which havesufficient thickness to fill the recesses and extend past the lips g andto fill the space above and below the lever, and thus produce acomfortably-close-fitting bearing for the lever on which the leverslides back and forth. The entire bearing is upon these bearings, andthere is no wear on the box itself, and the bearings are wholly confinedwithin the lips g at both ends. By this construction I am enabled toemploy bearing-pieces, which, though they may break from the severepounding which the machine undergoes, will, notwithstanding any breakageor splitting that may occur, remain in their places and do the work forwhich they are intended.

It is well known that in channeling-machines very severe strain comesupon the lever which operates the drills and that the jar and vibrationis carried back to the bearingbox, notwithstanding the springsintervening the lever-sections. It has therefore been very difficult toget bearings for the lever so constructed and arranged as to withstandthe a wear and tear that comes upon them and be serviceable,notwithstanding that they were broken. If they were not serviceable inthis way, it would necessitate the stopping of the machine and theremoval of the broken bearing and the insertion of a new one every timeone became broken, and this would greatly interfere With the operationsof the machine. The present construction therefore is deemed especiallydesirable and serviceable, because In a stone-channeling machine, thelever for operating the drills pivoted between its ends and having thedrills attached to one end, in combination with a box supporting theopposite end of said lever and connected with the power-shaft, said boxmade in a single piece and having an opening longitudinally through itscenter for the said lever, and recesses above and below the lever,closed at their ends and provided with separate bearing-pieces confinedin said recesses and between which said lever is supported and adaptedto slide, substantially as described.

Witness my hand to the foregoing specification this 18th day ofSeptember, 1891.

WILLIAM H. BRYANT.

\Vitnesses:

H. G. REDINGTON, H. A. PLATO.

